Answer
3.5≤r
Work Step by Step
9≤−12+6r ⟶ add 12 to both sides
9+12≤−12+6r+12 ⟶ simplify
21≤6r ⟶ divide both sides by 6
21÷6≤6r÷6 ⟶ simplify
3.5≤r
Check the endpoint.
9=−12+6(3.5)
9=−12+21
9=9✓
Check the inequality.
9≤−12+6(4)
9≤−12+24
9≤12✓
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 3 - Solving Inequalities - 3-4 Solving Multi-Step Inequalities - Practice and Problem-Solving Exercises - Page 190: 13
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